Mountaineer shuts off

My 2005 Mountaineer shut down at a red light, I could crank it back up but when I put it in drive, it would go dead again. I finally got it cranked back up, but only with limited rpms. I got it back home, and it was running on full rpms. My wife drove it this morning and it ran fine, until she was returning home it quit on her again. It cranked up and she drove it home. The message center said that it was in failsafe mode. Is it the electronic throttle control, or do I need to start at the fuel filter and go from there. It will be carried to my mechanic on monday. Just curious.

It might be a blockage in your fuel lines, this will sometimes make your car go into failsafe, because it knows there is gas in the car but a limited amount reaches the carbarettor, this is also why it will sometimes stop while trying to "rapidly" accelarate ( from a red light )

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Do you get a trouble indication?
Ford products have Coils On Plugs that are problematic. I have a 2005 Lincoln and had the same problem (only my dash light came on); it cost me $1500 to have all of my COP's replaced. You should get check engine that will tell them which one is bad.
You don't have to put the car in park to reset the system, just put in Neutral, shut engine off, restart, put car in Drive.
Gary

Take it somewhere else and have the computer scanned. If it's stalling out, there has to be trouble codes stored in the computer. Any decent mechanic would test drive the car and try to duplicate the problem. At the very least they should have tried to diagnose the problem. If they can't work a car without the aid of the computer, they need to find another livelihood. I will do some research and get back with you asap.

Could be a number of things and the information is a little vague. Does it do it when cold, warm, after driving for a distance etc. It might pay to have some one run a diagnostic machine on it. The cost for the test could actually save you money. Just make sure they have a good reputation.